Added experiments

TODO.rst

@@ -1,7 +1,8 @@
 + Fix unittests
 + Fix exceptions when websocket server disappears
-
 Fix thread exceptions
+    Finish creating low-level _SocketIO to eliminate cyclic references
+    Move namespace and callback handling to _ListenerThread
 
 Integrate Zac's fork #6
 Integrate Sajal's fork #7

experiments/callableweakref-tests.py

@@ -0,0 +1,170 @@
+# Note 1: The expected behavior of weakref to an instance is that it should
+# return None if no other strong references to the instance exist,
+# signalling that the instance can be safely garbage collected.
+#
+# Note 2: The expected behavior of weakref to a method is that it should
+# return None if no other strong references to the parent instance exist,
+# signalling that the parent instance can be safely garbage collected.
+#
+# Note 3: The IPython interpreter stores its own references and will
+# produce results different from those of the default Python interpreter.
+import callableweakref
+import weakref
+import unittest
+
+
+class TestCallableWeakRef(unittest.TestCase):
+
+    def test_instanceDirectWeakref_dies_on_arrival(self):
+        'Assert that weakref works as expected'
+        instanceDirectWeakref = weakref.ref(Instance())
+        assert instanceDirectWeakref() is None
+
+    def test_instanceIndirectWeakref_dies_when_instance_dies(self):
+        'Assert that weakref works as expected'
+        instance = Instance()
+        instanceIndirectWeakref = weakref.ref(instance)
+        assert instanceIndirectWeakref() is instance
+        del instance
+        assert instanceIndirectWeakref() is None
+
+    def test_boundMethodDirectWeakref_dies_on_arrival(self):
+        'Assert that weakref does not work as expected'
+        instance = Instance()
+        boundMethodDirectWeakref = weakref.ref(instance.call)
+        assert boundMethodDirectWeakref() is None  # Should be instance
+
+    def test_boundMethodIndirectWeakref_lives_when_instance_dies(self):
+        'Assert that weakref works as expected'
+        instance = Instance()
+        boundMethod = instance.call
+        boundMethodIndirectWeakref = weakref.ref(boundMethod)
+        assert boundMethodIndirectWeakref() is boundMethod
+        del instance
+        assert boundMethodIndirectWeakref() is boundMethod
+        del boundMethod
+        assert boundMethodIndirectWeakref() is None
+
+    def test_unboundMethodDirectWeakref_dies_on_arrival(self):
+        'Assert that weakref does not work as expected'
+        unboundMethodDirectWeakref = weakref.ref(Instance.call)
+        assert unboundMethodDirectWeakref() is None  # Should be Instance.call
+
+    def test_unboundMethodIndirectWeakref_dies_when_unboundMethod_dies(self):
+        'Assert that weakref works as expected'
+        unboundMethod = Instance.call
+        unboundMethodIndirectWeakref = weakref.ref(unboundMethod)
+        assert unboundMethodIndirectWeakref() is unboundMethod
+        del unboundMethod
+        assert unboundMethodIndirectWeakref() is None
+
+    def test_classFunctionDirectWeakref_dies_on_arrival(self):
+        'Assert that weakref works as expected'
+        classFunctionDirectWeakref = weakref.ref(Instance())
+        assert classFunctionDirectWeakref() is None
+
+    def test_classFunctionIndirectWeakref_dies_when_classFunction_dies(self):
+        'Assert that weakref works as expected'
+        classFunction = Instance()
+        classFunctionIndirectWeakref = weakref.ref(classFunction)
+        assert classFunctionIndirectWeakref() is classFunction
+        del classFunction
+        assert classFunctionIndirectWeakref() is None
+
+    def test_normalFunctionDirectWeakref_dies_when_normal_function_dies(self):
+        'Assert that weakref works as expected'
+        call = lambda: None
+        normalFunctionDirectWeakref = weakref.ref(call)
+        assert normalFunctionDirectWeakref() is call
+        del call
+        assert normalFunctionDirectWeakref() is None
+
+    def test_normalFunctionIndirectWeakref_dies_when_normal_function_dies(self):
+        'Assert that weakref works as expected'
+        call = lambda: None
+        normalFunction = call
+        normalFunctionIndirectWeakref = weakref.ref(normalFunction)
+        assert normalFunctionIndirectWeakref() is normalFunction
+        del normalFunction
+        assert normalFunctionIndirectWeakref() is call
+        del call
+        assert normalFunctionIndirectWeakref() is None
+
+    # Assert that CallableWeakref works as expected for callables
+
+    def test_boundMethodDirectCallableWeakref_dies_when_instance_dies(self):
+        instance = Instance()
+        boundMethodDirectCallableWeakref = callableweakref.ref(instance.call)
+        self.assertEqual(boundMethodDirectCallableWeakref(), instance.call)
+        del instance
+        assert boundMethodDirectCallableWeakref() is None
+
+    def test_boundMethodIndirectCallableWeakref_dies_when_instance_dies(self):
+        instance = Instance()
+        boundMethod = instance.call
+        boundMethodIndirectCallableWeakref = callableweakref.ref(boundMethod)
+        self.assertEqual(boundMethodIndirectCallableWeakref(), boundMethod)
+        del instance
+        self.assertEqual(boundMethodIndirectCallableWeakref(), boundMethod)
+        del boundMethod
+        assert boundMethodIndirectCallableWeakref() is None
+
+    def test_unboundMethodDirectCallableWeakref_lives_on_arrival(self):
+        unboundMethodDirectCallableWeakref = callableweakref.ref(Instance.call)
+        self.assertEqual(unboundMethodDirectCallableWeakref(), Instance.call)
+
+    def test_unboundMethodIndirectCallableWeakref_lives_on_arrival(self):
+        unboundMethod = Instance.call
+        unboundMethodIndirectCallableWeakref = callableweakref.ref(unboundMethod)
+        self.assertEqual(unboundMethodIndirectCallableWeakref(), unboundMethod)
+
+    def test_classMethodIndirectCallableWeakref_lives_on_arrival(self):
+        classMethod = Instance.call_classmethod
+        classMethodIndirectCallableWeakref = callableweakref.ref(classMethod)
+        self.assertEqual(classMethodIndirectCallableWeakref(), classMethod)
+
+    def test_staticMethodIndirectCallableWeakref_lives_on_arrival(self):
+        staticMethod = Instance.call_staticmethod
+        staticMethodIndirectCallableWeakref = callableweakref.ref(staticMethod)
+        self.assertEqual(staticMethodIndirectCallableWeakref(), staticMethod)
+
+    def test_classFunctionDirectCallableWeakref_dies_on_arrival(self):
+        classFunctionDirectCallableWeakref = callableweakref.ref(Instance())
+        assert classFunctionDirectCallableWeakref() is None
+
+    def test_classFunctionIndirectCallableWeakref_dies_when_classFunction_dies(self):
+        classFunction = Instance()
+        classFunctionIndirectCallableWeakref = callableweakref.ref(classFunction)
+        self.assertEqual(classFunctionIndirectCallableWeakref(), classFunction.__call__)
+        del classFunction
+        assert classFunctionIndirectCallableWeakref() is None
+
+    def test_normalFunctionDirectCallableWeakref_lives_on_arrival(self):
+        call = lambda: None
+        normalFunctionDirectCallableWeakref = callableweakref.ref(call)
+        self.assertEqual(normalFunctionDirectCallableWeakref(), call)
+
+    def test_normalFunctionIndirectCallableWeakref_lives_on_arrival(self):
+        call = lambda: None
+        normalFunction = call
+        normalFunctionIndirectWeakref = callableweakref.ref(normalFunction)
+        self.assertEqual(normalFunctionIndirectWeakref(), normalFunction)
+        del normalFunction
+        self.assertEqual(normalFunctionIndirectWeakref(), call)
+
+
+class Instance(object):
+
+    def __call__(self):
+        pass
+
+    def call(self):
+        pass
+
+    @classmethod
+    def call_classmethod(Class):
+        pass
+
+    @staticmethod
+    def call_staticmethod():
+        pass

experiments/callableweakref.py

@@ -0,0 +1,52 @@
+import types
+import weakref
+
+
+def ref(function):
+    return CallableWeakReference(function)
+
+
+class CallableWeakReference(object):
+
+    def __init__(self, function):
+        'Create a weak reference to a callable'
+        try:
+            if function.im_self:
+                # We have a bound method or class method
+                self._reference = weakref.ref(function.im_self)
+            else:
+                # We have an unbound method
+                self._reference = None
+            self._function = function.im_func
+            self._class = function.im_class
+        except AttributeError:
+            try:
+                function.func_code
+                # We have a normal function or static method
+                self._reference = None
+                self._function = function
+                self._class = None
+            except AttributeError:
+                function = function.__call__
+                # We have a class masquerading as a function
+                self._reference = weakref.ref(function.im_self)
+                self._function = function.im_func
+                self._class = function.im_class
+
+    def __call__(self):
+        if self.dead:
+            return
+        if self._reference:
+            # We have a bound method
+            return types.MethodType(self._function, self._reference(), self._class)
+        elif self._class:
+            return types.MethodType(self._function, None, self._class)
+        else:
+            return self._function
+
+    @property
+    def dead(self):
+        if self._reference and not self._reference():
+            # We have a bound method whose parent reference has died
+            return True
+        return False

experiments/t0.py

@@ -0,0 +1,6 @@
+from socketIO_client import SocketIO
+
+s = SocketIO('localhost', 8000)
+del s
+from time import sleep
+sleep(3)

experiments/t1.py

@@ -0,0 +1,7 @@
+class O(object):
+
+    def __del__(self):
+        print '__del__()'
+
+
+o = O()

experiments/t10.py

@@ -0,0 +1,16 @@
+class A(object):
+
+    def __init__(self):
+        self.b = B(self)
+
+    def __del__(self):
+        print '__del__()'
+
+
+class B(object):
+
+    def __init__(self, a):
+        self.a = a
+
+
+a = A()

experiments/t11.py

@@ -0,0 +1,21 @@
+class A(object):
+
+    def __init__(self):
+        self.c = Common()
+        self.b = B(self.c)
+
+    def __del__(self):
+        print '__del__()'
+
+
+class B(object):
+
+    def __init__(self, c):
+        self.c = c
+
+
+class Common(object):
+    pass
+
+
+a = A()

experiments/t12.py

@@ -0,0 +1,32 @@
+# Will the destructor of a class be called if its two children have cyclic
+# references to each other?  Yes.
+
+
+class Parent(object):
+
+    def __init__(self):
+        self.child = Child()
+
+    def __del__(self):
+        print 'Parent.__del__()'
+
+
+class Child(object):
+
+    def __init__(self):
+        self.grandChild = GrandChild(self)
+
+    def __del__(self):
+        print 'Child.__del__()'
+
+
+class GrandChild(object):
+
+    def __init__(self, parent):
+        self.parent = parent
+
+    def __del__(self):
+        print 'GrandChild.__del__()'
+
+
+parent = Parent()

experiments/t2.py

@@ -0,0 +1,19 @@
+import weakref
+
+
+class O(object):
+
+    def __init__(self):
+        self.p = P(self)
+
+    def __del__(self):
+        print '__del__()'
+
+
+class P(object):
+
+    def __init__(self, parent):
+        self.parent = weakref.ref(parent)
+
+
+o = O()

experiments/t3.py

@@ -0,0 +1,19 @@
+class O(object):
+
+    def __init__(self):
+        self.p = P(self.f)
+
+    def __del__(self):
+        print '__del__()'
+
+    def f(self):
+        pass
+
+
+class P(object):
+
+    def __init__(self, parentMethod):
+        self.parentMethod = parentMethod
+
+
+o = O()

experiments/t4.py

@@ -0,0 +1,26 @@
+import weakref
+
+
+class O(object):
+
+    def __init__(self):
+        self.p = P(self.f)
+
+    def __del__(self):
+        print '__del__()'
+
+    def f(self):
+        pass
+
+
+class P(object):
+
+    def __init__(self, parentMethod):
+        self.parentMethod = weakref.ref(parentMethod)
+
+    def show(self):
+        print self.parentMethod
+
+
+o = O()
+o.p.show()  # Dead on arrival

experiments/t5.py

@@ -0,0 +1,30 @@
+import callableweakref
+
+
+class O(object):
+
+    def __init__(self):
+        self.p = P(self.f)
+
+    def __del__(self):
+        print '__del__()'
+
+    def f(self):
+        print 'f()'
+
+
+class P(object):
+
+    def __init__(self, parentMethod):
+        self.parentMethod = callableweakref.ref(parentMethod)
+
+    def show(self):
+        print self.parentMethod
+
+    def run(self):
+        self.parentMethod()()
+
+
+o = O()
+o.p.show()
+o.p.run()

socketIO_client/__init__.py

@@ -1,18 +1,13 @@
-import sys
-import traceback
-
 import socket
+import weakref
 from anyjson import dumps, loads
 from functools import partial
-from threading import Thread, Event
+from threading import Event, Thread
 from time import sleep
 from urllib import urlopen
 from websocket import WebSocketConnectionClosedException, create_connection
 
 
-__version__ = '0.4'
-
-
 PROTOCOL = 1  # SocketIO protocol version
 
 
@@ -49,112 +44,64 @@ class BaseNamespace(object):  # pragma: no cover
         print '[Reconnect]', args
 
 
+class Channel(object):
+
+    def __init__(self, socketIO, channelName, Namespace):
+        self._socketIO = weakref.proxy(socketIO)
+        self._channelName = channelName
+        self._namespace = Namespace(self)
+        self._callbackByEvent = {}
+
+    def disconnect(self):
+        self._socketIO.disconnect(self._channelName)
+
+    def emit(self, eventName, *eventArguments):
+        self._socketIO.emit(eventName, *eventArguments, channelName=self._channelName)
+
+    def message(self, messageData, callback=None):
+        self._socketIO.message(messageData, callback, channelName=self._channelName)
+
+    def on(self, eventName, eventCallback):
+        self._callbackByEvent[eventName] = eventCallback
+
+
 class SocketIO(object):
 
-    _messageID = 0
-
     def __init__(self, host, port, Namespace=BaseNamespace, secure=False, proxies=None):
-        self._host = host
-        self._port = int(port)
-        self._namespace = Namespace(self)
-        self._secure = secure
-        self._proxies = proxies
-        self._connect()
+        self._socketIO = _SocketIO(host, port, secure, proxies)
 
-        heartbeatInterval = self._heartbeatTimeout - 2
-        self._heartbeatThread = RhythmicThread(heartbeatInterval, self._send_heartbeat)
+        self._heartbeatThread = _RhythmicThread(
+            self._socketIO.heartbeatTimeout,
+            self._socketIO.send_heartbeat)
         self._heartbeatThread.start()
 
-        self._channelByName = {}
-        self._callbackByEvent = {}
-        self._namespaceThread = ListenerThread(self._recv_packet, self._get_callback)
+        self._namespace = Namespace(self._socketIO)
+        self._namespaceThread = _ListenerThread(self._socketIO)
         self._namespaceThread.start()
 
     def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_value, traceback):
-        self.__del__()
+        self.disconnect()
 
     def __del__(self):
-        self._heartbeatThread.cancel()
-        self._namespaceThread.cancel()
-        self._connection.close()
-
-    def _connect(self):
-        baseURL = '%s:%d/socket.io/%s' % (self._host, self._port, PROTOCOL)
-        try:
-            response = urlopen('%s://%s/' % (
-                'https' if self._secure else 'http', baseURL),
-                proxies=self._proxies)
-        except IOError:  # pragma: no cover
-            raise SocketIOError('Could not start connection')
-        if 200 != response.getcode():  # pragma: no cover
-            raise SocketIOError('Could not establish connection')
-        responseParts = response.readline().split(':')
-        self._sessionID = responseParts[0]
-        self._heartbeatTimeout = int(responseParts[1])
-        self._connectionTimeout = int(responseParts[2])
-        self._supportedTransports = responseParts[3].split(',')
-        if 'websocket' not in self._supportedTransports:
-            raise SocketIOError('Could not parse handshake')  # pragma: no cover
-        socketURL = '%s://%s/websocket/%s' % (
-            'wss' if self._secure else 'ws', baseURL, self._sessionID)
-        self._connection = create_connection(socketURL)
-
-    def _recv_packet(self):
-        code, packetID, channelName, data = -1, None, None, None
-        try:
-            packet = self._connection.recv()
-        except WebSocketConnectionClosedException:
-            raise SocketIOConnectionError('Lost connection (Connection closed)')
-        except socket.timeout:
-            raise SocketIOConnectionError('Lost connection (Connection timed out)')
-        try:
-            packetParts = packet.split(':', 3)
-        except AttributeError:
-            raise SocketIOPacketError('Received invalid packet (%s)' % packet)
-        packetCount = len(packetParts)
-        if 4 == packetCount:
-            code, packetID, channelName, data = packetParts
-        elif 3 == packetCount:
-            code, packetID, channelName = packetParts
-        elif 1 == packetCount:  # pragma: no cover
-            code = packetParts[0]
-        return int(code), packetID, channelName, data
-
-    def _send_packet(self, code, channelName='', data='', callback=None):
-        callbackNumber = self._set_callback(callback) if callback else ''
-        packetParts = [str(code), callbackNumber, channelName, data]
-        try:
-            self._connection.send(':'.join(packetParts))
-        except socket.error:
-            raise SocketIOPacketError('Could not send packet')
+        self.disconnect()
 
     def disconnect(self, channelName=''):
         self._send_packet(0, channelName)
         if channelName:
-            del self._channelByName[channelName]
+            del self.channelByName[channelName]
         else:
-            self.__del__()
-
-    @property
-    def connected(self):
-        return self._connection.connected
+            self._heartbeatThread.cancel()
+            self._namespaceThread.cancel()
 
     def connect(self, channelName, Namespace=BaseNamespace):
         channel = Channel(self, channelName, Namespace)
-        self._channelByName[channelName] = channel
-        self._send_packet(1, channelName)
+        self.channelByName[channelName] = channel
+        self.send_packet(1, channelName)
         return channel
 
-    def _send_heartbeat(self):
-        try:
-            self._send_packet(2)
-        except SocketIOPacketError:
-            print 'Could not send heartbeat'
-            pass
-
     def message(self, messageData, callback=None, channelName=''):
         if isinstance(messageData, basestring):
             code = 3
@@ -174,25 +121,6 @@ class SocketIO(object):
         data = dumps(dict(name=eventName, args=eventArguments))
         self._send_packet(code, channelName, data, callback)
 
-    def _get_callback(self, channelName, eventName):
-        'Get callback associated with channelName and eventName'
-        socketIO = self._channelByName[channelName] if channelName else self
-        try:
-            return socketIO._callbackByEvent[eventName]
-        except KeyError:
-            pass
-
-        def callback_(*eventArguments):
-            return socketIO._namespace.on_(eventName, *eventArguments)
-        callbackName = 'on_' + eventName.replace(' ', '_')
-        return getattr(socketIO._namespace, callbackName, callback_)
-
-    def _set_callback(self, callback):
-        'Set callback that will be called after receiving an acknowledgment'
-        self._messageID += 1
-        self._namespaceThread.set_callback(self._messageID, callback)
-        return '%s+' % self._messageID
-
     def on(self, eventName, callback):
         self._callbackByEvent[eventName] = callback
 
@@ -203,75 +131,179 @@ class SocketIO(object):
             sleep(seconds)
         else:
             try:
-                while self.connected:
+                while self._socketIO.connected:
                     sleep(1)
             except KeyboardInterrupt:
                 pass
 
 
-class Channel(object):
+class _SocketIO(object):
+    'Low-level interface to remove cyclic references in child threads'
 
-    def __init__(self, socketIO, channelName, Namespace):
-        self._socketIO = socketIO
-        self._channelName = channelName
-        self._namespace = Namespace(self)
-        self._callbackByEvent = {}
+    messageID = 0
 
-    def disconnect(self):
-        self._socketIO.disconnect(self._channelName)
+    def __init__(self, host, port, secure=False, proxies=None):
+        self.connect(host, port, secure, proxies)
+        self.callbackByMessageID = {}
+        self.callbackByEvent = {}
+        self.channelByName = {}
 
-    def emit(self, eventName, *eventArguments):
-        self._socketIO.emit(eventName, *eventArguments, channelName=self._channelName)
+    def __del__(self):
+        self.connection.close()
 
-    def message(self, messageData, callback=None):
-        self._socketIO.message(messageData, callback, channelName=self._channelName)
+    def connect(self, host, port, secure, proxies):
+        baseURL = '%s:%d/socket.io/%s' % (host, port, PROTOCOL)
+        targetScheme = 'https' if secure else 'http'
+        targetURL = '%s://%s/' % (targetScheme, baseURL)
+        try:
+            response = urlopen(targetURL, proxies=proxies)
+        except IOError:  # pragma: no cover
+            raise SocketIOError('Could not start connection')
+        if 200 != response.getcode():  # pragma: no cover
+            raise SocketIOError('Could not establish connection')
+        responseParts = response.readline().split(':')
+        sessionID = responseParts[0]
+        heartbeatTimeout = int(responseParts[1])
+        # connectionTimeout = int(responseParts[2])
+        supportedTransports = responseParts[3].split(',')
+        if 'websocket' not in supportedTransports:
+            raise SocketIOError('Could not parse handshake')  # pragma: no cover
+        socketScheme = 'wss' if secure else 'ws'
+        socketURL = '%s://%s/websocket/%s' % (socketScheme, baseURL, sessionID)
+        self.connection = create_connection(socketURL)
+        self.heartbeatInterval = heartbeatTimeout - 2
 
-    def on(self, eventName, eventCallback):
-        self._callbackByEvent[eventName] = eventCallback
+    def recv_packet(self):
+        code, packetID, channelName, data = -1, None, None, None
+        try:
+            packet = self.connection.recv()
+        except WebSocketConnectionClosedException:
+            raise SocketIOConnectionError('Lost connection (Connection closed)')
+        except socket.timeout:
+            raise SocketIOConnectionError('Lost connection (Connection timed out)')
+        try:
+            packetParts = packet.split(':', 3)
+        except AttributeError:
+            raise SocketIOPacketError('Received invalid packet (%s)' % packet)
+        packetCount = len(packetParts)
+        if 4 == packetCount:
+            code, packetID, channelName, data = packetParts
+        elif 3 == packetCount:
+            code, packetID, channelName = packetParts
+        elif 1 == packetCount:  # pragma: no cover
+            code = packetParts[0]
+        return int(code), packetID, channelName, data
+
+    def send_packet(self, code, channelName='', data='', callback=None):
+        callbackNumber = self.set_messageID_callback(callback) if callback else ''
+        packetParts = [str(code), callbackNumber, channelName, data]
+        try:
+            self.connection.send(':'.join(packetParts))
+        except socket.error:
+            raise SocketIOPacketError('Could not send packet')
+
+    def set_messageID_callback(self, callback):
+        'Set callback that will be called after receiving an acknowledgment'
+        self.messageID += 1
+        self.callbackByMessageID[self.messageID] = callback
+        return '%s+' % self.messageID
+
+    def get_messageID_callback(self, messageID):
+        'Get callback associated with messageID'
+        try:
+            callback = self.callbackByMessageID[messageID]
+            del self.callbackByMessageID[messageID]
+            return callback
+        except KeyError:
+            return
+
+    @property
+    def has_messageID_callback(self):
+        return True if self.callbackByMessageID else False
+
+    def get_event_callback(self, channelName, eventName):
+        'Get callback associated with channelName and eventName'
+        _socketIO = self.channelByName[channelName] if channelName else self
+        try:
+            return _socketIO.callbackByEvent[eventName]
+        except KeyError:
+            pass
+
+        def callback_(*eventArguments):
+            return _socketIO.namespace.on_(eventName, *eventArguments)
+        callbackName = 'on_' + eventName.replace(' ', '_')
+        return getattr(_socketIO.namespace, callbackName, callback_)
+
+    @property
+    def connected(self):
+        return self.connection.connected
+
+    def send_heartbeat(self):
+        try:
+            self.send_packet(2)
+        except SocketIOPacketError:
+            print 'Could not send heartbeat'
+            pass
 
 
-class ListenerThread(Thread):
+class _RhythmicThread(Thread):
+    'Execute call every few seconds'
+
+    daemon = True
+
+    def __init__(self, intervalInSeconds, call, *args, **kw):
+        super(_RhythmicThread, self).__init__()
+        self.intervalInSeconds = intervalInSeconds
+        self.call
+        self.args = args
+        self.kw = kw
+        self.done = Event()
+
+    def run(self):
+        while not self.done.is_set():
+            self.call(*self.args, **self.kw)
+            self.done.wait(self.intervalInSeconds)
+
+    def cancel(self):
+        self.done.set()
+
+
+class _ListenerThread(Thread):
     'Process messages from SocketIO server'
 
     daemon = True
 
-    def __init__(self, recv_packet, get_callback):
-        super(ListenerThread, self).__init__()
+    def __init__(self, _socketIO, get_event_callback, ):
+        super(_ListenerThread, self).__init__()
+        self._socketIO = _socketIO
         self.done = Event()
         self.waitingForCallbacks = Event()
-        self.callbackByMessageID = {}
-        self.recv_packet = recv_packet
-        self.get_callback = get_callback
 
     def run(self):
-        try:
-            while not self.done.is_set():
-                try:
-                    code, packetID, channelName, data = self.recv_packet()
-                except SocketIOConnectionError, error:
-                    print error
-                    return
-                except SocketIOPacketError, error:
-                    print error
-                    continue
-                get_channel_callback = partial(self.get_callback, channelName)
-                try:
-                    delegate = {
-                        0: self.on_disconnect,
-                        1: self.on_connect,
-                        2: self.on_heartbeat,
-                        3: self.on_message,
-                        4: self.on_json,
-                        5: self.on_event,
-                        6: self.on_acknowledgment,
-                        7: self.on_error,
-                    }[code]
-                except KeyError:
-                    continue
-                delegate(packetID, get_channel_callback, data)
-        except:
-            exc_type, exc_value, exc_traceback = sys.exc_info()
-            open('tracebacks.log', 'a+t').write('\n'.join(traceback.format_tb(exc_traceback)))
+        while not self.done.is_set():
+            try:
+                code, packetID, channelName, data = self._socketIO.recv_packet()
+            except SocketIOConnectionError, error:
+                print error
+                return
+            except SocketIOPacketError, error:
+                print error
+                continue
+            get_channel_callback = partial(self._socketIO.get_event_callback, channelName)
+            try:
+                delegate = {
+                    0: self.on_disconnect,
+                    1: self.on_connect,
+                    2: self.on_heartbeat,
+                    3: self.on_message,
+                    4: self.on_json,
+                    5: self.on_event,
+                    6: self.on_acknowledgment,
+                    7: self.on_error,
+                }[code]
+            except KeyError:
+                continue
+            delegate(packetID, get_channel_callback, data)
 
     def cancel(self):
         self.done.set()
@@ -280,9 +312,6 @@ class ListenerThread(Thread):
         self.waitingForCallbacks.set()
         self.join(seconds)
 
-    def set_callback(self, messageID, callback):
-        self.callbackByMessageID[messageID] = callback
-
     def on_disconnect(self, packetID, get_channel_callback, data):
         get_channel_callback('disconnect')()
 
@@ -308,48 +337,18 @@ class ListenerThread(Thread):
         dataParts = data.split('+', 1)
         messageID = int(dataParts[0])
         arguments = loads(dataParts[1]) or []
-        try:
-            callback = self.callbackByMessageID[messageID]
-        except KeyError:
-            pass
-        else:
-            del self.callbackByMessageID[messageID]
-            callback(*arguments)
-            callbackCount = len(self.callbackByMessageID)
-            if self.waitingForCallbacks.is_set() and not callbackCount:
-                self.cancel()
+        callback = self._socketIO.get_messageID_callback(messageID)
+        if not callback:
+            return
+        callback(*arguments)
+        if self.waitingForCallbacks.is_set() and not self._socketIO.has_messageID_callback:
+            self.cancel()
 
     def on_error(self, packetID, get_channel_callback, data):
         reason, advice = data.split('+', 1)
         get_channel_callback('error')(reason, advice)
 
 
-class RhythmicThread(Thread):
-    'Execute call every few seconds'
-
-    daemon = True
-
-    def __init__(self, intervalInSeconds, call, *args, **kw):
-        super(RhythmicThread, self).__init__()
-        self.intervalInSeconds = intervalInSeconds
-        self.call = call
-        self.args = args
-        self.kw = kw
-        self.done = Event()
-
-    def run(self):
-        try:
-            while not self.done.is_set():
-                self.call(*self.args, **self.kw)
-                self.done.wait(self.intervalInSeconds)
-        except:
-            exc_type, exc_value, exc_traceback = sys.exc_info()
-            open('tracebacks.log', 'a+t').write('\n'.join(traceback.format_tb(exc_traceback)))
-
-    def cancel(self):
-        self.done.set()
-
-
 class SocketIOError(Exception):
     pass